Cita APA (7a ed.)

Churchill, W. A. (1990). Watermarks in paper in Holland, England, France, etc., in the XVII and XVIII centuries and their interconnection. De Graaf.

Cita Chicago Style (17a ed.)

Churchill, William Algeron. Watermarks in Paper in Holland, England, France, Etc., in the XVII and XVIII Centuries and Their Interconnection. Nieuwkoop: De Graaf, 1990.

Cita MLA (9a ed.)

Churchill, William Algeron. Watermarks in Paper in Holland, England, France, Etc., in the XVII and XVIII Centuries and Their Interconnection. De Graaf, 1990.